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2026-06-11 23:58

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Conference: Bucharest University Faculty of Physics 2026 Meeting

Section: Solid State Physics and Materials Science

Title:

Transient magnetic field mapping with magneto-optical crystals

Authors:

Ana TIULEANU(1,2), Razvan UNGUREANU(1), Bogdan BUTOI(1), Valentin IONITA(3), Dorin MOLOVATA(1,3), Aurelian MARCU(1,3)

Affiliation:

1) National Institute for Lasers, Plasma and radiation Physics, RO-077125, Magurele, Romania

2) Faculty of Physics, University of Bucharest, RO-077125, Magurele, Romania

3) University ”Politehnica” of Bucharest, RO-060042, Bucharest, Romania

E-mail

ana.tiuleanu@inflpr.ro

Keywords:

transient magnetic field, magneto-optical crystals

Abstract:

Characterizing non-uniform, transient electromagnetic phenomena requires sensing capabilities that offer high temporal precision alongside spatial data. Unlike traditional scanning probe techniques which are limited by their sequential data acquisition, this study utilizes the magneto-optical effect in a Tb3Ga5O12 (TGG) crystal to achieve high-resolution mapping of dynamic magnetic fields. In the case in which the magnetic field gradient undergoes only a change in intensity and not spatial distribution, the spatio-temporal mapping of a transient magnetic field is possible without relying on ultra-fast equipment. This is done by employing two detectors to separately capture the spatial and temporal information of a transient magnetic field: a photodiode and a CCD camera. This method allows for the reconstruction of the temporal evolution of the magnetic field gradient, assuming that the precise acquisition window of the CCD camera is known. This study showcases experimental details regarding the measurement of an oscillating transitory magnetic field generated by pulsed discharge of a capacitor into a custom-built inductor, as well as the development of the experimental data processing algorithm.

Acknowledgement:

We acknowledge funds from the Ministry of Research, Innovation and Digitization / Institute of Atomic Physics, through ELI-RO 30/2024, support of the National Interest Infrastructure facility IOSIN – CETAL at INFLPR and Program contract No. 39/2024, Romanian National Core Program LAPLAS VII contract No. 30N/2023.